Cutting tool



Feb. 5,!1935. B ROSENBERG ET AL 1,990,310

CUTTING TOOL Filed July 30, 1932 A Z725 d INVENTORS //Qoef .5. @asf/Vage@ Patented Feb. 5, 1935 i wfrfsni oFFicE,

CUTTING 'room` Y Isidore B.

Rosenberg, Port Chester, and Isaac Fleer, New York, .N. Y;

. Application July yso, 1932, serialNo. 626,495.'

' 1 claim. (c1. :s1-.189)

This invention vrelates to improvements in cutting tools and more particularly to an implement vfor the cutting of metalpipe or. tubing.

' One of the mainfeaturesof the in'ventionrre` sides in a'pripe` cutting tool which maybe held in the yhand of an operator with the pipe to beA cut positioned'therein, andthe tool turned about the pipe to cause a rotary cutting'knife tocut through the walls thereof. The tool is especially adaptabler for the cutting of Asoft metal'pipes made vof copper, brass, andv like metals.

' Another feature of the invention isvto provide a pipe cutting tool in WhiCh-the'cutting knifer is simultaneously fed toward the pipeduring the turning of the tool about'the axis lof the pipe to compensate for the depth of the cut during al cutting operation. n'

A further object is the provision of Va pipe cutting tool which also embodies a reamer to enable .the cut end of a length ofpipe to be rearned free of any rough edges or burrswhich are formed thereon during thev cutting operation.

A further object ofthe invention is `to provide atool having the above features which issimple' Figure 2 is a vertical longitudinal sectional,

View. .l

Figure 3 is an end elevational View.l n Figure 4 is a fragmentary top plan view with parts in section and showing one. end of a pipe .in operative association with the reaming element.

Figure 5 is a vertical transverse sectional view on the line 5-5 of Figure 1.

Figure 6 is a fragmentary side elevational View' of a modified form. .l f

Figure 7 is a vertical transverse sectional View on the line '7-7 of Figure 6.

Referring to the drawing by reference vcharacters, and particularly to Figures 1 to 5 inclusive, the numeral 10 designates thepreferred embodiment of our invention in its kentirety and which includes a tubular casing 11 havingan internal bore 12 of uniform diameter throughvout itslength, While formed at one Vendor" the tubular casing and extending at right anglestov the axis thereof, is ahead 13 formed with a linger stop 14.

threaded as at 16 for v.threadedly receivinga screw cap 17, the end wall of which is'provided with an openingi. e L

The outer faceof'the'head'lB is provided with a .l-shaped notch 19, and` opening v onto the angular walls of the said notch are dove tailed shaped transversely disposedfgrooves 20'which reeeivethe dove tailed ribs or portions 21 of a removable V-shaped jaw 22. Pins 23 pass transversely through the dove tailed rib 21 forlizey-` ing the removablejaw member 22 in position,A By drivingV the pins free, the jaw elements'v22 may be removed for: replacementwhen desired. Slidable in the'bore 12 of the tubularcasing .1i isa vcylindrical carrier 24 which extends beyond the head 'end' of the tubular casing and 'is` 15. Thispin tends to prevent turning ofthe Thesame end ofthe tubular casing 11 'is provided withfinwardly extending carrier member 24 jrelative tov the `casing`for a purpose' to" be hereinafter appreciated.-

Extending atright' angle from the outerf'extendingend of thecarrierV 24 arespaced ears26 inl which'a stub shaft27 ismounted, whilesup' ported-bythe stub 4sh'aft'is a .rotarycutter or outer ends of the stub shaft 27 forsecuring the vshaft in position and which permit the withdrawal of lthe shaft vfrom its bearing in order to. remove the "cutting knife 28 for replacement purposes.'y y

Extending axially from` the inner endy of Athe vcylindrical carrier 24 is a screw shaft 29, 'the free end yof which passes throughthe opening 18 in the cap 17, and threadedly connects with a manipulating element 30 which acts. in the the screw shaft 29 and is interposed between the inner end of the cylindrical carrier 24 andthe sharpening or `r `capacity of a nut. The element 30 includes a f end wall of the cap 17, and this spring tends to maintain the nut element 30 against the cap v 17 and extends the carrier member 24 outwardly of the tubular casing upon the turning of the manipulating nut element 30 in one direction.

knife 28 to move outwardly to enable the piper or tube A to be Vseated inthev stationary jaw When so seated, the manipulating nut element 30 is turned in an opposite direction to cause the carrier member 24 to move inwardly of the tubular casing until the knifeedge engages the outer periphery of the pipe A; i The; pipe A.

is now held in clamped engagement with the stationary jaw and forms an axis about lfwhich the entirev tool `may be turned. Infpositio'ning ythe pipe or tube A `into the tool, .onelhand of the operator grasps the tubular casing .With the crotch portion of the lhand between the' thumbv andforefnger disposed against the finger stop v14. With the pipe A clamped in the tool, the

operatorinserts a finger through the ring portion Y31 o f the nut element 30` and proceeds to impart a turning movement tothe tool about the laxis flthe pipe A. During the turning of the tool Y about the pipe, the operator simultaneously imthe periphery ofthe pipe.

-pats a" turning movement to the nut element 30J'suflicient `to cause the inward movement ofj the carrier 24 in order that the rotary cutting knife128 will moveinwardly as the same cuts into Thus, the cutting knife is fed toward the pipe or tube during the rotation lor, turning of the tool about the axis ofthe -pipe until the walls of the pipe or tube havevbeen completely cut. For the cutting of a relatively thin pipe or tube, only a few turns ofthe tool about the axis ofthe pipe are necessary to effectl a complete severing of the tube. f

"The outer free end of the cylindrical carrier 24 is-bifurcated-as at 33` for receiving an ear 34 extending from a reaming element 35. A pin 36 passes through the furcations andthe ear`34 for Y' securing lthe reamingtool in position. By *refer-4 ence to' Figure 4 ofthe drawing, itwill be seen that by inserting the reamingtool against the outjgend'of the pipeiA, any burrs-oruneven edgev left upon thepipeby the. cutting operation may beA removedI in order to leave the end of thepipe free and smooth of anyuneven surface. 'I'he inner end of the slots 15 terminate at a proper position forengagement bythe pins 25 in advance of the complete :closing or inward, movement of the carrier in order to preventcontact ofthe cutter injuryk 28 with the jaw 22, whereby to avoid any to the cutter.

In Figures 6 and '7 of the drawing, we have shown a slightly modified form wherein the `head 13 formed on one end of the tubular casing 11' is provided with a V-shaped notch 19', and opening onto the angulary walls of the notch are transversely disposed annular recesses or seats` 37 in which rollers 38 vare. mounted.' Thefperipheries of the rollers extend beyond the faces of the notch 19', while the ends of the rollers extend beyond opposite sides of the Vhead 13 as best seen in Figure '7..of the drawing. .By extending the rollers 37 beyond opposite sides of the head 13', a longer bearingjsurface is provided for the pipe A when 4in c'lampedposition within` the tool and furthermore the said rollers are free to turn during the turning of the toolaboutthe axis of the pipe,

thus reducing the vamount of `fricton between the' `fixed jaw and the pipe toA be ut.

.While we havefshown'gand described whatwe deem to be the mostdesirable embodimentof `our invention, we lwish it 'to bey understood that varions changes asv come within the scopey of the appended claim may be resorted to if desired.

vHaving thus Ydescribedthe invention,V what we claim as new and desire to secure by Letters'Patentisfi", f, e' A pipe cutting tool comprising a tubularcasing open throughout its length, a removable cap apjawinP the v`outer side of said head, a cylindri-` .cal` *carrierV member slidably mounted in said cassaid carrier outwardly throughthe headed end of said casing, a cutter supported by the carrier and cooperating with the jaw for cutting a ,pipeV positioned therebetween, a screw shaftextending from the inner end ofV said carrier member and passing freely through; an opening in said cap, a manipulating nut threadedV to Ythe. *outerv end vof said screw-shaftand held in `abutting engagement' withsaid cap by said spring means anda pin and slot connection betweenthe carrier and saidcasingj to 'prevent relative -rotation therebetween, said pinv engaging the inner end lof l the slot tov formalstop in advance of thecomplete inward-movement `of the carrier to prevent contact of the cutter withzthe jaw.

. ISIDORE B.' ROSENBERG.

ISAAC FLEER. 'l

`,threadedto oneA end of the casing,' an vangular headiprovided on the opposite end of the casing,y 

